The use of GPS for guidance of mobile robots
has been reported as achieved in a number of
useful proximate scenarios such as stevadoring,
formation movement or search and agricultural
positioning. Standard DGPS can be used to get
an accuracy of under one metre sometimes
leaving fine motor adjustments by humans to
complete a task. Pay a lot more, and the
precision improves but the cost is high in any
commercial terms for the mass market. We
report high precision GPS-guided movement
based on the use of readily available low-cost
receivers. Accuracies of better than 5 cms
maintained over minutes have been demonstrated
and are being improved upon. The guidance
algorithms were adjusted to allow for the
retention of orientation when approaching close
to a destination. The introduction of the Galileo1
system will improve the efficacy and usefulness
of this method as we move from 24 to 30
satellites